Question

A store is having a sale where school supplies are 30% off their original price. A backpack is on sale for $11.20. What was the original price for the backpack?

Answer 1

To find the original price, you could use a variable to represent the original price in this equation;

Let p represent the original price

.70 × p=11.20

to solve this, we'd isolate the variable (p) 

p=11.20 ÷.70

p=16

The original price was $16